NAR 8258 – Railway Pressure Switch
The pressure switch NAR 8258 with 1 or 2 switching outputs and increased accuracy of 0.3 % was specifically designed for railway vehicles (EN 50155) and has a long-term stable thin-film-on-steel sensor cell. The wide temperature range from -40°C to +125°C and the triple overpressure protection make the NAR 8258 the ideal choice for railway vehicles in rough environmental conditions.
| Applications | Railways |
| Category | Electronic pressure switches |
| Accuracy @ 25°C typ. | ± 0.3 % FS typ. |
| Measuring principle | Thin-film-on-steel |
| Approval / conformity |
EN 50155 (Railway) EN 45545-2 (Fire protection) EN 61373 (Shock, vibration) EN 50121-3-2 (EMC) |
| Vibration |
15 g RMS (20...2000 Hz) (EN60068-2-64) 25 g sin (80...2000 Hz), 1 oct./min, (1x @ 25°C) (EN60068-2-6) |
| NLH @ 25°C (BSL) typ. | ± 0.2 % FS typ. |
| Pressure connections |
G1/4" m; G1/4" m (Manometer); 1/4"NPT m; 7/16"-20UNF m, SAE4 (J1926); R1/4" m, DIN2999; M10x1 m, DIN EN ISO 6149-2; M12x1.5 m, DIN EN ISO 9974-2 |
| Media temperature | –40°C ... +125°C |
| Shock |
50 g / 11 ms 100 g / 6 ms Male electrical plug M12x1 (EN60068-2-27) 3) |
| Electrical connections | M12x1 |
| Long term stability 1 year typ. | < ± 0.1 % FS typ. |
| Ambient temperature | –40°C ... +125°C |
| Protection | IP65, IP67 |
| Output signal |
Switching output: 1 or 2 PNP transistors |
| TEB typ. @ -25 ... +85°C | ± 1.0 % FS typ. |
| Measuring range |
0 ... 6 to 0 ... 600 bar 0 ... 100 to 0 ... 7500 psi |
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